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MANCHESTER -- A man shot and killed early Sunday morning at a Lake Avenue apartment had kicked open the door and rushed at the resident along with another intruder, authorities said Monday.

Authorities said they have not charged the shooter, although an investigation continues. They would not identify the shooter Monday, but said the victim was Michael Larocque Jr., 24.

An autopsy determined that Larocque died from a gunshot wound to the arm and abdomen, prosecutors said.

According to homicide prosecutors, the apartment resident told police he armed himself with a handgun when he heard unknown people on his porch. He fired the gun at the intruders once they kicked in the door, rushed inside and charged him.

"The other intruder escaped and has not been apprehended yet. The Manchester police are working to positively identify that man and question him," homicide prosecutor Jeffery Strelzin said in a statement released Monday. Police do not believe he was shot.

Strelzin said the invasion does not appear to be random.

As for a reason, Strelzin said, "We have some information about that, but it is incomplete at this time."

Also in the apartment was the man's fiance and her 3-year-old daughter. Neither of the two was hurt, and the man suffered only minor physical injuries.

Anyone with information about the matter should call Manchester Police detectives at 668-8711 or Manchester Crimeline at 624-4040.

An earlier story follows:

MANCHESTER — Violence erupted in a city neighborhood early Sunday morning, as a visitor to a Lake Avenue apartment was shot to death, allegedly by someone who lived there, investigators said.

The death has been termed a homicide, but the names of the victim and the suspected gunman have not been released.

"The circumstances of the incident, including the motives of those involved, are under investigation," Senior Assistant Attorney General Jeffery Strelzin, chief of the homicide unit, said in an email response to a Union Leader reporter's questions.

At about 3 a.m. Sunday morning, police responded to a 911 call and found the body of a man in a second-floor apartment in the multi-unit building at 430 Lake Ave.

The building includes a commercial establishment which fronts on Lake Avenue and the apartments, which face a driveway. The shooting scene is next to the Odd Fellows Hall on Lake Avenue.

Three months ago, Manchester Community Resources Center and the police substation moved into the first floor of the hall, which has undergone a $3.4 million renovation paid for in part by money provided by a federal neighborhood stabilization fund.

The substation is not manned around the clock, but is a frequent stopping point for officers who work the neighborhood to handle paperwork and perform other chores.

The man killed did not live in the apartment, police said. Authorities believe one of three residents of the apartment fired the fatal shot.

One of the residents of the apartment suffered a minor injury, while two others were not hurt, according to a statement released by the Attorney General's Office.

The building is near the corner of Lake Avenue and Hall Street. Neighbors say the driveway for the apartment building is often used by residents of Litchfield Lane, which runs parallel to Lake Avenue, as a shortcut to a Lake Avenue variety store.

One nearby resident said that while he slept through the shooting, other family members reported hearing a loud commotion from the area in the early morning hours.

Police are seeking help from the public in their investigation. Anyone with information is asked to call Manchester police detectives at 668-8711 or Manchester crimeline at (603) 624-4040.

It is the second homicide in the city in the last month.

Mark Donnelly, 31, was killed May 18 while walking in the area of Pine and Prospect streets.

According to witness accounts, Donnelly was shot by a man who approached him in a car after Donnelly and his friends had made fun of a woman panhandling. The woman said she would return with her boyfriend. Minutes later, a man in a car drove up and showed a gun. After Donnelly said he would fight the man "one on one," several gunshots were fired, witnesses have said.